20 terms

CH. 11 Sexual Reproduction and Meiosis Questions

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As a result of meiotic division, the chromosome number is
halved.
Reduction division occurs during
meiosis.
Meiosis results in a change in chromosomal number as shown by
2n to n.
Meiosis differs from mitosis in that
it occurs in the formation of gametes.
Which is NOT a true association?
meiosis—daughter cells with twice the chromosome number as mother cell
Crossing-over
is a way to recombine the genetic material during meiosis.
During crossing-over,
recombination occurs between the genes on the sister chromatids of homologous pairs.
One duplication of chromosomes followed by two subsequent reduction divisions occurs
only in meiosis.
Tetrads (four chromatids) are seen
during meiosis I.
During meiosis II,
sister chromatids separate.
Why do homologous chromosomes pair in prophase I and not in prophase II?
The cells are haploid during prophase II and therefore can't pair.
An error in meiosis that results in an abnormal number of chromosomes in the final haploid cell
can result from the failure of chromosomes to move to opposite poles during meiosis I.
can result from the failure of chromosomes to move to opposite poles during meiosis II.
is a condition called aneuploidy.
can result from nondisjunction.
If cyclin B levels did NOT drop between meiosis I and II, one probable outcome is?
DNA replication is likely to occur
True or False: In plants, the direct result of meiosis is the production of gametes
False
During which phase of meiosis does crossing over occur?
Prophase I
Which of the following statements is true?
Meiosis involves two nuclear divisions without having DNA replication occurring between meiosis I and II.
A single diploid cell is divided into two haploid cells during
meiosis only.
Daughter nuclei form from each parent cell during
telophase I and telophase II.
Tetrads form during
prophase I.
In which stage are duplicated chromosomes singly lined up during meiosis?
only metaphase II